Hawaii and Guam Concerns; Record Warmth Spreads Eastward; Heavy Snow for Sierra-Nevada; Severe Weather for the Plains

A very active spring pattern with tropical concerns across the Pacific. Heavy rainfall will continue to impact Hawaii this weekend. Meanwhile we continue to monitor a developing typhoon that may affect Guam into early next week. For the Lower 48, heavy snow for mountains of California this weekend, increase threat for severe thunderstorms next week for the Plains and record warmth spreads east. Read More >

Current conditions at

LOS ALTOS (LOAC1)

Lat: 37.35472°NLon: 122.14167°WElev: 539.0ft.

52°F

11°C

Humidity	100%
Wind Speed	W 2 MPH
Barometer	NA
Dewpoint	52°F (11°C)
Visibility	NA
Last update	11 Apr 04:10 AM PDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

2 Miles SSW Cupertino CA

Overnight
Low: 50 °F
Slight Chance
Rain
Saturday
High: 62 °F
Chance
Showers then
Showers
Saturday Night
Low: 46 °F
Heavy Rain
then Showers
Likely
Sunday
High: 59 °F
Showers
Sunday Night
Low: 44 °F
Chance Rain
and Patchy
Fog
Monday
High: 64 °F
Patchy Fog
then Mostly
Sunny
Monday Night
Low: 44 °F
Mostly Clear
Tuesday
High: 66 °F
Sunny
Tuesday Night
Low: 43 °F
Mostly Clear

Detailed Forecast

Overnight

A 20 percent chance of rain. Partly cloudy, with a low around 50. Light south wind.

Saturday

A chance of rain and thunderstorms, then showers and possibly a thunderstorm after 4pm. High near 62. South wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Saturday Night

Showers and possibly a thunderstorm before 10pm, then a chance of showers and thunderstorms between 10pm and 11pm, then showers likely and possibly a thunderstorm after 11pm. Some of the storms could produce heavy rainfall. Low around 46. South southwest wind 9 to 16 mph, with gusts as high as 32 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

Sunday

Showers and possibly a thunderstorm. High near 59. South southwest wind around 10 mph, with gusts as high as 22 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Sunday Night

A 30 percent chance of rain, mainly before 11pm. Patchy fog after 5am. Otherwise, partly cloudy, with a low around 44. West southwest wind 5 to 9 mph becoming calm in the evening.

Monday

Patchy fog before 8am. Otherwise, mostly sunny, with a high near 64.

Monday Night

Mostly clear, with a low around 44.

Tuesday

Sunny, with a high near 66.

Tuesday Night

Mostly clear, with a low around 43.

Wednesday

Mostly sunny, with a high near 66.

Wednesday Night

Partly cloudy, with a low around 46.